MULTIPLE PHASE-TRANSITIONS AND FERROIC PR OPERTIES OF PB5AL3F19

Authors
RAVEZ J ABRAHAMS SC
Citation
J. Ravez et Sc. Abrahams, MULTIPLE PHASE-TRANSITIONS AND FERROIC PR OPERTIES OF PB5AL3F19, COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE C-CHIMIE, 1(1), 1998, pp. 15-19
Citations number
13
Categorie Soggetti
Chemistry
Journal title
COMPTES RENDUS DE L ACADEMIE DES SCIENCES SERIE II FASCICULE C-CHIMIE → ACNP
ISSN journal
13871609
Volume
1
Issue
1
Year of publication
1998
Pages
15 - 19
Database
ISI
SICI code
1387-1609(1998)1:1<15:MPAFPO>2.0.ZU;2-D
Abstract
Pb5Al3F19, a member of the isostructural Pb5M3F19 family with M = Al, Ti, V, Cr, Fe and Ga, differs from the remaining members in having thr ee additional phases between its ferroelectric phase V and its paraele ctric phase I. Phase TV is shown to be antiferroelectric, phase III fe rroelastic and phase II paraelectric. Each phase(2)has been fully char acterized. Formation of the three extra phases is attributed to intera ctions between the G(sp) lone electron pair of the Pb2+ ion and volume effects related to the small Al3+ ion.